Method of revivifying carbonaceous filtering mediums



s A ss sso of pj h s i; QM?

' "'"iEIlxIR-ZUE, 03'' NEW YORK, N. '21; DOROTHEA EGSEPHINE ELIZABETH WE-11$- OF REVIVIFYING CAEBONACEQ'ifE FILTERI'NG- MEDIZHVIS.

RICH 01 SAID IVIOBIA HEINRICH, DECEASED.

3H0 x oplicatios. fil'lefi I 'fovember 29, 1920 Eerie NoAZYJZZS.

T0 a-ZZ whom is may 6022061759 Be it known I 1, Moms 'WEINRIGI-I, s citizen of the I J niceti Sta-fies, residing at Now York city, in the count 1 of New or i and Sisteof New York, have invented oertem and useful improvements in.

Methods 01" Beviviifyiog Csrhonaceous Elite: ii Joshuses of which the ioliowmg mg me" 11 in the way so gi'snolsi his the; sovmifieasion of finely may he 1 less as: oon'tencs, is very or ublesome and expensive, These finely divided. chess are generally conneefiioo, with filter presses eni have found; way of fevivifi in inexpensive way messes pi oper, so that they eon in their moisi: state as soon hs'en the I out my hivemirm she mode wooioi he follows:

111s pio'viieo "with sbis or essays-coils, the he mixec'i with ziivifieafi :Eiiw'l g materials, snci kept in contact for to 40 minutes oy of the si irierssnai tho desired "temperature by means of the steam-jackets or coils. These tanks shall he placed on a, floor to 20 feet shove the filter presses, so that the presses can he fille. by gravity. The ordinary frame 'fil'ssr presses wish. frames of 'i so inch ihieimess and so ooostruoteol than; ihe cakes iiormed in the frames can he miss-hea piefi for this process. soon of mes have is 1 arrdjhe ous'fieo granular mehesiols can tanks, is turned on and tho cakes which have formed in the frames are first sweetened ofi iI-Ilti then Washed until the escaping Water is colorless. When this point has been reschecl the Wash- Water is turnefi of? and the purification or re'vivifieshion of the material begins. For this purpose a closed tank is pissed-0n the ssmefloor as the oohezr mentioned books, this tank containing boiling; Water to which sufiicient ammonia, hy drake (aqua ammonia) is schieci so that it shows a density of about'one ziegree Bsum. Ehis soiusion now follows she pure Wash- Water and by penetrating she cakes of the filtering it Wili dissoive and r move the remaining color and imymities.

The water running oii wiil show considerable color at first, which. will grsdusily lighten, and as soon as this 00101- hes disoppeorec'i altogether, the ammonia, mm is stopped and boiling WiLtEI from the pure yvster tank is agsin'surned on in ofier to temove the remaining ammonia, Weiss? from the cakes. As soon as the ammonia is removes; fizhe flow of pure Water is shopped, and; compressed air is now turnec'i on and passed through the -cakes to remove a. posh of tho water left in the cakes.

when shis has been accomplished the presses with the revivified material are emptied into tho-ail: hoppers under which Wagons shall be run into which the material falls, These Wagons are elevated. upon the upper floor and emptied into the mixing tanks where the material issgsin used. It; is well known shat the eonciense Water of the second, third and fourth effects of multiple effects is beet and sugar isoibories, and; also in sugar refineries, contains some ammonia. which runs to Waste. This condense Water to which additional smmoliia has been added to obtain the desired. density may he used so good efieci: with. this process and she Working expense thereby lessened.

In case "very iark and impure solutions, as for instance molasses, are to he treated by the filtering; msferieis, it is advisable to discard 2, small percentage of the material after each use, replace it by new material, ihus "Keeping the efiicieney of the msterisis sis their highest Enstesci of filter presses, other suitable soporetos he oseli "m the some way with jpiocess, as for insileme hog filters min 011%, I generally prefer im use (if filter by Letters Patient is:

The method of reviviiymg vegeir car bon after it has been kspt in COAtiiCt "Wf'h w Wm soiutions to 0 purified my tiiemafaei' run into filter presses, and while: it remains in hick c iisists in.

e ging Water A "Washing the cakeS with a, no; 211311101118, solutien fGhf-lf freeing the, i'enminifig color and imp'iiriuieis from the cakes flien again Washing with 110?; Wat-e1 to remova the re a1 mionia sol'ufiion fllfill the: 0; es than. jacking the calms i0 ('ZOHLDT'BSSQCIL air 7%; 1'3" the same and finally dissch i'evivifie Tom the presseui in testimony whereof 1 nereunm s1 gnatuz'ea 

